CartoCSS conditionals + TurboCARTO

style.css

#layer{
  polygon-gamma: 0.5;
  polygon-opacity: 0.8;
  [participac <= 70]{
    polygon-fill: ramp([participac], (#813753, #a65461, #541f3f, #c1766f, #d39c83, #e0c2a2, #ede5cf), jenks)
    /* the color palette is switched, in fact it is only using two colors/classes */
  }
  [participac > 70]{
    polygon-fill: ramp([participac], (#d1eeea,#a8dbd9,#85c4c9,#68abb8,#4f90a6,#3b738f,#2a5674), jenks)
  }
}